A similar pattern (and overlooked very often) is with DB updates where you want to increment a number by 1, but split it into 2 roundtrips to the DB to get the

A similar pattern (and overlooked very often) is with DB updates where you want to increment a number by 1, but split it into 2 roundtrips to the DB to get the existing value and set it to `value + 1`. Concurrent transactions can screw it up, and you wouldn't notice until an escalation happens.